Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Christine Hoang Trang Truong, O.D.
Optometrist in Tustin, CA · enumerated 2013.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1487092581
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Registry record
Entity type Individual (Type 1)
Name Christine Hoang Trang Truong
Credential O.D.
Sex Female
Practice address 2521 Michelle Dr, Tustin, CA, 92780
Phone (888) 988-2800
Enumeration date Jun 11, 2013
Last updated in NPPES Dec 6, 2021
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Christine Truong?
Christine Truong is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Mary Ruppert Family Medicine Physician · Tustin, CA NPI 1346372026 Elizabeth Chung Optometrist · Tustin, CA NPI 1407011273 Grace Chang Broderick Internal Medicine Physician · Tustin, CA NPI 1548525264 Ana Lamadrid Pharmacist · Tustin, CA NPI 1215475264 Linh Kamikawa Pharmacist · Tustin, CA NPI 1902345887 Natasha Mitchell Optometrist · Tustin, CA NPI 1033884358
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-06.